Prsentation PowerPoint
Contact resistance problems applying ERT on low bulk density
forested stony soilsIs there a solution?
Deborah Deraedt1, Camille Touz1, Tanguy Robert2, Gilles
Colinet1, Aurore Degr1, and Sarah Garr1University of Lige, Gembloux
Agro Bio-Tech, BIOSE, EESP, Gembloux, Belgium AQUALE,
Noville-les-Bois, Belgium
AimsWe use ERT (Electrical Resistivity Tomography) for 2
purposes:
1. To determine soil depth
2. To quantify water fluxes heterogeneity
Both along a forested slope with high stone content
2Where do we come from?ForestTerrameter LSDAS-1
Material & MethodsForestBelgian Ardennes
Spruce and douglas mix
30 years old
Silty soil with high stone content (surface average : 45%)
Low bulk density (surface average : 1.25g/cm)
Rather dry soil all the year long
Material & MethodsForestTerrameter LS
Electrodes layout :
Two types of configurations tested:
Single array
Dipole-dipoleWenner-Schlumberger6.3 m10 cm
63 electrodesMaterial & MethodsForestDAS-1
Electrodes layout :
Configurations tested :
5 arrays (2*2m, 1*3m, 2*2m)
Dipole DipoleWenner-SchlumbergerWenner Alpha
49 electrodesMaterial & MethodsPastureDAS-17
Material & MethodsPasture
Central Belgium
Silty soil
Low stone content (
